(转)中文语音识别技术在c#中的应用(一) 出处：CSDN

在.net中,对英文语音有较好的支持，但是对中文语音的支持还没有加入进来，我们要想实现中文发音或中文语音识别，必需先安装微软的Speech Application SDK（SASDK），它的最新版本是 SAPI 5.1 他能够识别中、日、英三种语言，你可以在这里下载：http://www.microsoft.com/speech/download/sdk51/,需要安装这两个文件Speech SDK 5.1和5.1 Language Pack，其中5.1 Language Pack可以选择安装支持的语言。

  安装好以后，我们就可以开始进行语音程序的开发了，当然，在这之前我们需要把SAPI.dll通过如下图所示添加到引用中

  下面我们设计一个能够朗读中英文混合语言的类：

  我们将用单例模式实现该类，类的代码如下，我们将详细解释：

public class Speach      {           private static Speach _Instance = null ;           private SpeechLib.SpVoiceClass voice =null;           private Speach()          {               BuildSpeach() ;          }          public static Speach instance()          {               if (_Instance == null)                    _Instance = new Speach() ;               return _Instance ;          }           private void SetChinaVoice()          {               voice.Voice = voice.GetVoices(string.Empty,string.Empty).Item(0) ;          }           private void SetEnglishVoice()          {               voice.Voice = voice.GetVoices(string.Empty,string.Empty).Item(1) ;

}           private void SpeakChina(string strSpeak)          {               SetChinaVoice() ;               Speak(strSpeak) ;          }           private void SpeakEnglishi(string strSpeak)          {               SetEnglishVoice() ;               Speak(strSpeak) ;          }          public void AnalyseSpeak(string strSpeak)          {               int iCbeg = 0 ;               int iEbeg = 0 ;               bool IsChina = true ;               for(int i=0;i<strSpeak.Length;i++)               {                    char chr = strSpeak[i] ;                    if (IsChina)                    {                        if (chr<=122&&chr>=65)                        {                             int iLen = i - iCbeg ;

string strValue = strSpeak.Substring(iCbeg,iLen) ;                             SpeakChina(strValue) ;                             iEbeg = i ;                             IsChina = false ;                        }                    }                    else                    {                        if (chr>122||chr<65)                        {                             int iLen = i - iEbeg ;                             string strValue = strSpeak.Substring(iEbeg,iLen) ;                             this.SpeakEnglishi(strValue) ;                             iCbeg = i ;                             IsChina = true ;                        }                    }               }//end for               if (IsChina)               {                    int iLen = strSpeak.Length - iCbeg ;                    string strValue = strSpeak.Substring(iCbeg,iLen) ;                    SpeakChina(strValue) ;               }

else               {                    int iLen = strSpeak.Length - iEbeg ;                    string strValue = strSpeak.Substring(iEbeg,iLen) ;                    SpeakEnglishi(strValue) ;               }          }           private void BuildSpeach()          {               if (voice == null)                    voice = new SpVoiceClass() ;                       }          public int Volume          {               get               {                    return voice.Volume ;               }               set               {                    voice.SetVolume((ushort)(value)) ;               }          }

public int Rate          {               get               {                    return voice.Rate ;               }               set               {                    voice.SetRate(value) ;               }          }           private void Speak(string strSpeack)          {               try               {                    voice.Speak(strSpeack,SpeechVoiceSpeakFlags.SVSFlagsAsync) ;               }               catch(Exception err)               {                    throw(new Exception("发生一个错误："+err.Message)) ;               }          }          public void Stop()

{               voice.Speak(string.Empty,SpeechLib.SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak) ;          }          public void Pause()          {               voice.Pause() ;          }          public void Continue()          {               voice.Resume() ;          }      }//end class

 

  在 private SpeechLib.SpVoiceClass voice =null;这里，我们定义个一个用来发音的类，并且在第一次调用该类时，对它用BuildSpeach方法进行了初始化。

  我们还定义了两个属性Volume和Rate，能够设置音量和语速。

  我们知道，SpVoiceClass 有一个Speak方法，我们发音主要就是给他传递一个字符串，它负责读出该字符串，如下所示。

private void Speak(string strSpeack)         {               try               {                    voice.Speak(strSpeack,SpeechVoiceSpeakFlags.SVSFlagsAsync) ;               }               catch(Exception err)               {                    throw(new Exception("发生一个错误："+err.Message)) ;               }          }

  其中SpeechVoiceSpeakFlags.SVSFlagsAsync表示异步发音。